[lvm-devel] stable-2.02 - Revert "Revert "vgcreate/vgextend: restrict PVs with mixed block sizes""
David Teigland
teigland at sourceware.org
Thu Oct 24 15:27:30 UTC 2019
Gitweb: https://sourceware.org/git/?p=lvm2.git;a=commitdiff;h=c2853147639ca31f16539a4e6316ef3320811497
Commit: c2853147639ca31f16539a4e6316ef3320811497
Parent: 4e99308b7cab21fd79d1290a5aa47aee4ee4a76e
Author: David Teigland <teigland at redhat.com>
AuthorDate: Thu Oct 24 10:01:12 2019 -0500
Committer: David Teigland <teigland at redhat.com>
CommitterDate: Thu Oct 24 10:01:12 2019 -0500
Revert "Revert "vgcreate/vgextend: restrict PVs with mixed block sizes""
This reverts commit c37aa7881d840c429b858ee0068f0151e46ce0d9.
Put back the setting again, but the next commit will just
turn off the new behavior by default.
---
lib/commands/toolcontext.h | 1 +
lib/config/config_settings.h | 5 ++++
lib/metadata/metadata-exported.h | 1 +
lib/metadata/metadata.c | 44 +++++++++++++++++++++++++++++++++++
tools/lvmcmdline.c | 2 +
tools/toollib.c | 47 ++++++++++++++++++++++++++++++++++++++
tools/vgcreate.c | 2 +
7 files changed, 102 insertions(+), 0 deletions(-)
diff --git a/lib/commands/toolcontext.h b/lib/commands/toolcontext.h
index 4b2a079..497f4bd 100644
--- a/lib/commands/toolcontext.h
+++ b/lib/commands/toolcontext.h
@@ -155,6 +155,7 @@ struct cmd_context {
unsigned include_shared_vgs:1; /* report/display cmds can reveal lockd VGs */
unsigned include_active_foreign_vgs:1; /* cmd should process foreign VGs with active LVs */
unsigned vg_read_print_access_error:1; /* print access errors from vg_read */
+ unsigned allow_mixed_block_sizes:1;
unsigned force_access_clustered:1;
unsigned lockd_gl_disable:1;
unsigned lockd_vg_disable:1;
diff --git a/lib/config/config_settings.h b/lib/config/config_settings.h
index 0e81252..7981d5d 100644
--- a/lib/config/config_settings.h
+++ b/lib/config/config_settings.h
@@ -470,6 +470,11 @@ cfg(devices_allow_changes_with_duplicate_pvs_CFG, "allow_changes_with_duplicate_
"Enabling this setting allows the VG to be used as usual even with\n"
"uncertain devices.\n")
+cfg(devices_allow_mixed_block_sizes_CFG, "allow_mixed_block_sizes", devices_CFG_SECTION, 0, CFG_TYPE_BOOL, 0, vsn(2, 3, 6), NULL, 0, NULL,
+ "Allow PVs in the same VG with different logical block sizes.\n"
+ "When allowed, the user is responsible to ensure that an LV is\n"
+ "using PVs with matching block sizes when necessary.\n")
+
cfg_array(allocation_cling_tag_list_CFG, "cling_tag_list", allocation_CFG_SECTION, CFG_DEFAULT_UNDEFINED, CFG_TYPE_STRING, NULL, vsn(2, 2, 77), NULL, 0, NULL,
"Advise LVM which PVs to use when searching for new space.\n"
"When searching for free space to extend an LV, the 'cling' allocation\n"
diff --git a/lib/metadata/metadata-exported.h b/lib/metadata/metadata-exported.h
index 75caba1..9c24132 100644
--- a/lib/metadata/metadata-exported.h
+++ b/lib/metadata/metadata-exported.h
@@ -591,6 +591,7 @@ struct pvcreate_params {
unsigned is_remove : 1; /* is removing PVs, not creating */
unsigned preserve_existing : 1;
unsigned check_failed : 1;
+ unsigned check_consistent_block_size : 1;
};
struct lvresize_params {
diff --git a/lib/metadata/metadata.c b/lib/metadata/metadata.c
index cb38f66..81a6029 100644
--- a/lib/metadata/metadata.c
+++ b/lib/metadata/metadata.c
@@ -699,12 +699,40 @@ int vg_extend_each_pv(struct volume_group *vg, struct pvcreate_params *pp)
{
struct pv_list *pvl;
unsigned int max_phys_block_size = 0;
+ unsigned int physical_block_size, logical_block_size;
+ unsigned int prev_lbs = 0;
+ int inconsistent_existing_lbs = 0;
log_debug_metadata("Adding PVs to VG %s.", vg->name);
if (vg_bad_status_bits(vg, RESIZEABLE_VG))
return_0;
+ /*
+ * Check if existing PVs have inconsistent block sizes.
+ * If so, do not enforce new devices to be consistent.
+ */
+ dm_list_iterate_items(pvl, &vg->pvs) {
+ logical_block_size = 0;
+ physical_block_size = 0;
+
+ if (!dev_get_direct_block_sizes(pvl->pv->dev, &physical_block_size, &logical_block_size))
+ continue;
+
+ if (!logical_block_size)
+ continue;
+
+ if (!prev_lbs) {
+ prev_lbs = logical_block_size;
+ continue;
+ }
+
+ if (prev_lbs != logical_block_size) {
+ inconsistent_existing_lbs = 1;
+ break;
+ }
+ }
+
dm_list_iterate_items(pvl, &pp->pvs) {
log_debug_metadata("Adding PV %s to VG %s.", pv_dev_name(pvl->pv), vg->name);
@@ -715,6 +743,22 @@ int vg_extend_each_pv(struct volume_group *vg, struct pvcreate_params *pp)
return 0;
}
+ logical_block_size = 0;
+ physical_block_size = 0;
+
+ if (!dev_get_direct_block_sizes(pvl->pv->dev, &physical_block_size, &logical_block_size))
+ log_warn("WARNING: PV %s has unknown block size.", pv_dev_name(pvl->pv));
+
+ else if (prev_lbs && logical_block_size && (logical_block_size != prev_lbs)) {
+ if (vg->cmd->allow_mixed_block_sizes || inconsistent_existing_lbs)
+ log_debug("Devices have inconsistent block sizes (%u and %u)", prev_lbs, logical_block_size);
+ else {
+ log_error("Devices have inconsistent logical block sizes (%u and %u).",
+ prev_lbs, logical_block_size);
+ return 0;
+ }
+ }
+
if (!add_pv_to_vg(vg, pv_dev_name(pvl->pv), pvl->pv, 0)) {
log_error("PV %s cannot be added to VG %s.",
pv_dev_name(pvl->pv), vg->name);
diff --git a/tools/lvmcmdline.c b/tools/lvmcmdline.c
index 6a1ab11..9c39f48 100644
--- a/tools/lvmcmdline.c
+++ b/tools/lvmcmdline.c
@@ -2306,6 +2306,8 @@ static int _get_current_settings(struct cmd_context *cmd)
if (cmd->cname->flags & CAN_USE_ONE_SCAN)
cmd->can_use_one_scan = 1;
+ cmd->allow_mixed_block_sizes = find_config_tree_bool(cmd, devices_allow_mixed_block_sizes_CFG, NULL);
+
cmd->partial_activation = 0;
cmd->degraded_activation = 0;
activation_mode = find_config_tree_str(cmd, activation_mode_CFG, NULL);
diff --git a/tools/toollib.c b/tools/toollib.c
index 1b01ccc..42179d9 100644
--- a/tools/toollib.c
+++ b/tools/toollib.c
@@ -5481,6 +5481,8 @@ int pvcreate_each_device(struct cmd_context *cmd,
struct device_list *devl;
const char *pv_name;
int consistent = 0;
+ unsigned int physical_block_size, logical_block_size;
+ unsigned int prev_pbs = 0, prev_lbs = 0;
int must_use_all = (cmd->cname->flags & MUST_USE_ALL_ARGS);
int found;
unsigned i;
@@ -5559,6 +5561,51 @@ int pvcreate_each_device(struct cmd_context *cmd,
pd->dev = dev_cache_get(pd->name, cmd->full_filter);
/*
+ * Check for consistent block sizes.
+ */
+ if (pp->check_consistent_block_size) {
+ dm_list_iterate_items(pd, &pp->arg_devices) {
+ if (!pd->dev)
+ continue;
+
+ logical_block_size = 0;
+ physical_block_size = 0;
+
+ if (!dev_get_direct_block_sizes(pd->dev, &physical_block_size, &logical_block_size)) {
+ log_warn("WARNING: Unknown block size for device %s.", dev_name(pd->dev));
+ continue;
+ }
+
+ if (!logical_block_size) {
+ log_warn("WARNING: Unknown logical_block_size for device %s.", dev_name(pd->dev));
+ continue;
+ }
+
+ if (!prev_lbs) {
+ prev_lbs = logical_block_size;
+ prev_pbs = physical_block_size;
+ continue;
+ }
+
+ if (prev_lbs == logical_block_size) {
+ /* Require lbs to match, just warn about unmatching pbs. */
+ if (!cmd->allow_mixed_block_sizes && prev_pbs && physical_block_size &&
+ (prev_pbs != physical_block_size))
+ log_warn("WARNING: Devices have inconsistent physical block sizes (%u and %u).",
+ prev_pbs, physical_block_size);
+ continue;
+ }
+
+ if (!cmd->allow_mixed_block_sizes) {
+ log_error("Devices have inconsistent logical block sizes (%u and %u).",
+ prev_lbs, logical_block_size);
+ log_print("See lvm.conf allow_mixed_block_sizes.");
+ return 0;
+ }
+ }
+ }
+
+ /*
* Use process_each_pv to search all existing PVs and devices.
*
* This is a slightly different way to use process_each_pv, because the
diff --git a/tools/vgcreate.c b/tools/vgcreate.c
index 4356d99..7add53b 100644
--- a/tools/vgcreate.c
+++ b/tools/vgcreate.c
@@ -48,6 +48,8 @@ int vgcreate(struct cmd_context *cmd, int argc, char **argv)
/* Don't create a new PV on top of an existing PV like pvcreate does. */
pp.preserve_existing = 1;
+ pp.check_consistent_block_size = 1;
+
if (!vgcreate_params_set_defaults(cmd, &vp_def, NULL))
return EINVALID_CMD_LINE;
vp_def.vg_name = vg_name;
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